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The Structure of Sr2(VO4)Cl and Sr2(CrO4)Cl and Spectroscopic Properties of Mn5+ - and Cr5+-Doped Sr2(VO4)Cl

✍ Scribed by C. Albrecht; S. Cohen; I. Mayer; D. Reinen

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
379 KB
Volume
107
Category
Article
ISSN
0022-4596

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✦ Synopsis

The structures of the spodiosite-type compounds (\mathrm{Sr}{2}\left(M^{\mathrm{v}} \mathrm{O}{4}\right) \mathrm{Cl}[M=\mathrm{V}, \mathrm{Cr}]) and the spectroscopic properties (EPR, ligand field) of (\mathrm{Mn}^{5+}). and (\mathrm{Cr}^{5+})-doped (\mathrm{Sr}{2}\left(\mathrm{VO}{4}\right) \mathrm{Cl}\left[{ }^{3} A_{2}\right.) and ({ }^{2} E) ground states in (T_{d}), respectively] are reported. Evidence is presented that (\mathrm{Cr}^{3+}) undergoes vibronic coupling effects of the Jahn-Teller type. Paramagnetic probe cations will only reflect the geometry of a host site, if they possess nondegenerate ground states in the respective symmetry and if their ionic radii are comparable to those of the host cations. 1993 Academic Press, Inc.

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Crystal Structures and Magnetic Properties of CrO4-4-Containing Oxides: Sr2CrO4, Ba2CrO4, and Ba3CrO5
✍ Guo Liu; J.E. Greedan; Wenhe Gong πŸ“‚ Article πŸ“… 1993 πŸ› Elsevier Science 🌐 English βš– 410 KB

Refinement of the crystal structures of \(\mathrm{Ba}_{2} \mathrm{CrO}_{4}\) and \(\mathrm{Ba}_{3} \mathrm{CrO}_{5}\) using powder neutron diffraction data has confirmed that the former is isostructural with \(\beta-\mathrm{K}_{2} \mathrm{SO}_{4}\) and the latter isostructural with \(\mathrm{Cs}_{3}